First print crash into bed, but passed all calabration & homing.
 
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[Solved] First print crash into bed, but passed all calabration & homing.  

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Nerfygeko
(@nerfygeko)
Member
First print crash into bed, but passed all calabration & homing.

Hi first time posting here, any help would be appreciated. Let me know if you need any more specific information. 

I just finished assembling, firmware update (6.4.0), calibrating and homing. Calibration initially failed on Z-axis due to binding on the front left trapezoid nut. I re-checked all of them, firmly screwing them in then backing off half a turn. After this the Z-axis calibration passed twice. All other calibration passed.

I then attempted to do the "benchy rules..." from the USB supplied with the printer.

Based on memory and video I was taking with my phone the SOE was this: 

  1. Loaded filament (using sample PLA)
  2. Purging
  3. Waiting for hotend
  4. Homing (looked successful - based on other CNC machines I have used)
  5. Detecting sheet metal
  6. nozzle cleaning
  7. Waiting for bed
  8. Probing bed 1-9 (these seemed to work, as it touched the bed and went back up and moved to the next spot, in a grid pattern round the center of the bed)
  9. Addition probing 1-3 (these also seemed to work, but it touched three spots round the front right side of the bed)
  10. Waiting for hotend (at this point PLA started coming out of the extruder)
  11. Print will end today at 13:35 - This is where it started going wrong. the extruder was in the front right hand side of the bed, it started moving left and down but did not stop. It impacted the bed and started pushing into the plate and moving the whole plate left. 

I panicked a bit and pressed the "reset" button on the control unit, not sure if this is the right action when this occurs. 

I now have a gouge  in what was my brand new smooth PLA plate. 🙁

After it booted up again I went into control and told it to home again, which it did successfully.

The only other thing I can think of is when I first turned on the printer and firmware updated it, it was self detecting the printer as a "COREONE" not a "COREONE+", I confirmed the firmware file on the USB was for the "COREONE+" so I just moved on. Not sure if this has any relevance?

Any idea where I should go from here to troubleshoot this?

Posted : 31/12/2025 5:19 am
Nerfygeko
(@nerfygeko)
Member
Topic starter answered:
RE: First print crash into bed, but passed all calabration & homing.

Figured it out. I had not done up the thumb screws on the nextruder tight enough. It was all the way in when the calibration occurred that's why it passed, but my best guess is when I fed in the filament (or when it started extruding) on the first print the hotend was pushed out by about 8mm. 

Posted : 31/12/2025 9:13 am
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